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/* Copyright (C) 2001, 2009, 2010, 2011 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 3 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
/* This file is included in vm.c multiple times */
#if (VM_ENGINE == SCM_VM_REGULAR_ENGINE)
#define VM_USE_HOOKS 0 /* Various hooks */
#define VM_CHECK_OBJECT 1 /* Check object table */
#define VM_CHECK_FREE_VARIABLES 1 /* Check free variable access */
#elif (VM_ENGINE == SCM_VM_DEBUG_ENGINE)
#define VM_USE_HOOKS 1
#define VM_CHECK_OBJECT 1
#define VM_CHECK_FREE_VARIABLES 1
#else
#error unknown debug engine VM_ENGINE
#endif
#include "vm-engine.h"
static SCM
VM_NAME (SCM vm, SCM program, SCM *argv, int nargs)
{
/* VM registers */
register scm_t_uint8 *ip IP_REG; /* instruction pointer */
register SCM *sp SP_REG; /* stack pointer */
register SCM *fp FP_REG; /* frame pointer */
struct scm_vm *vp = SCM_VM_DATA (vm);
/* Cache variables */
struct scm_objcode *bp = NULL; /* program base pointer */
SCM *objects = NULL; /* constant objects */
size_t object_count = 0; /* length of OBJECTS */
SCM *stack_limit = vp->stack_limit; /* stack limit address */
SCM dynstate = SCM_I_CURRENT_THREAD->dynamic_state;
scm_t_int64 vm_cookie = vp->cookie++;
/* Internal variables */
int nvalues = 0;
const char *func_name = NULL; /* used for error reporting */
SCM finish_args; /* used both for returns: both in error
and normal situations */
#ifdef HAVE_LABELS_AS_VALUES
static void **jump_table = NULL;
#endif
#ifdef HAVE_LABELS_AS_VALUES
if (SCM_UNLIKELY (!jump_table))
{
int i;
jump_table = malloc (SCM_VM_NUM_INSTRUCTIONS * sizeof(void*));
for (i = 0; i < SCM_VM_NUM_INSTRUCTIONS; i++)
jump_table[i] = &&vm_error_bad_instruction;
#define VM_INSTRUCTION_TO_LABEL 1
#include <libguile/vm-expand.h>
#include <libguile/vm-i-system.i>
#include <libguile/vm-i-scheme.i>
#include <libguile/vm-i-loader.i>
#undef VM_INSTRUCTION_TO_LABEL
}
#endif
/* Initialization */
{
SCM prog = program;
/* Boot program */
program = vm_make_boot_program (nargs);
/* Initial frame */
CACHE_REGISTER ();
PUSH ((SCM)fp); /* dynamic link */
PUSH (0); /* mvra */
PUSH ((SCM)ip); /* ra */
CACHE_PROGRAM ();
PUSH (program);
fp = sp + 1;
ip = SCM_C_OBJCODE_BASE (bp);
/* MV-call frame, function & arguments */
PUSH ((SCM)fp); /* dynamic link */
PUSH (0); /* mvra */
PUSH (0); /* ra */
PUSH (prog);
if (SCM_UNLIKELY (sp + nargs >= stack_limit))
goto vm_error_too_many_args;
while (nargs--)
PUSH (*argv++);
}
/* Let's go! */
NEXT;
#ifndef HAVE_LABELS_AS_VALUES
vm_start:
switch ((*ip++) & SCM_VM_INSTRUCTION_MASK) {
#endif
#include "vm-expand.h"
#include "vm-i-system.c"
#include "vm-i-scheme.c"
#include "vm-i-loader.c"
#ifndef HAVE_LABELS_AS_VALUES
default:
goto vm_error_bad_instruction;
}
#endif
vm_done:
SYNC_ALL ();
return finish_args;
/* Errors */
{
SCM err_msg;
/* FIXME: need to sync regs before allocating anything, in each case. */
vm_error_bad_instruction:
err_msg = scm_from_locale_string ("VM: Bad instruction: ~s");
finish_args = scm_list_1 (scm_from_uchar (ip[-1]));
goto vm_error;
vm_error_unbound:
/* FINISH_ARGS should be the name of the unbound variable. */
SYNC_ALL ();
err_msg = scm_from_locale_string ("Unbound variable: ~s");
scm_error_scm (scm_misc_error_key, program, err_msg,
scm_list_1 (finish_args), SCM_BOOL_F);
goto vm_error;
vm_error_unbound_fluid:
SYNC_ALL ();
err_msg = scm_from_locale_string ("Unbound fluid: ~s");
scm_error_scm (scm_misc_error_key, program, err_msg,
scm_list_1 (finish_args), SCM_BOOL_F);
goto vm_error;
vm_error_not_a_variable:
SYNC_ALL ();
scm_error (scm_arg_type_key, func_name, "Not a variable: ~S",
scm_list_1 (finish_args), scm_list_1 (finish_args));
goto vm_error;
vm_error_apply_to_non_list:
SYNC_ALL ();
scm_error (scm_arg_type_key, "apply", "Apply to non-list: ~S",
scm_list_1 (finish_args), scm_list_1 (finish_args));
goto vm_error;
vm_error_kwargs_length_not_even:
SYNC_ALL ();
err_msg = scm_from_locale_string ("Odd length of keyword argument list");
scm_error_scm (sym_keyword_argument_error, program, err_msg,
SCM_EOL, SCM_BOOL_F);
vm_error_kwargs_invalid_keyword:
/* FIXME say which one it was */
SYNC_ALL ();
err_msg = scm_from_locale_string ("Invalid keyword");
scm_error_scm (sym_keyword_argument_error, program, err_msg,
SCM_EOL, SCM_BOOL_F);
vm_error_kwargs_unrecognized_keyword:
/* FIXME say which one it was */
SYNC_ALL ();
err_msg = scm_from_locale_string ("Unrecognized keyword");
scm_error_scm (sym_keyword_argument_error, program, err_msg,
SCM_EOL, SCM_BOOL_F);
vm_error_too_many_args:
err_msg = scm_from_locale_string ("VM: Too many arguments");
finish_args = scm_list_1 (scm_from_int (nargs));
goto vm_error;
vm_error_wrong_num_args:
/* nargs and program are valid */
SYNC_ALL ();
scm_wrong_num_args (program);
/* shouldn't get here */
goto vm_error;
vm_error_wrong_type_apply:
SYNC_ALL ();
scm_error (scm_arg_type_key, NULL, "Wrong type to apply: ~S",
scm_list_1 (program), scm_list_1 (program));
goto vm_error;
vm_error_stack_overflow:
err_msg = scm_from_locale_string ("VM: Stack overflow");
finish_args = SCM_EOL;
if (stack_limit < vp->stack_base + vp->stack_size)
/* There are VM_STACK_RESERVE_SIZE bytes left. Make them available so
that `throw' below can run on this VM. */
vp->stack_limit = vp->stack_base + vp->stack_size;
goto vm_error;
vm_error_stack_underflow:
err_msg = scm_from_locale_string ("VM: Stack underflow");
finish_args = SCM_EOL;
goto vm_error;
vm_error_improper_list:
err_msg = scm_from_locale_string ("Expected a proper list, but got object with tail ~s");
goto vm_error;
vm_error_not_a_pair:
SYNC_ALL ();
scm_wrong_type_arg_msg (func_name, 1, finish_args, "pair");
/* shouldn't get here */
goto vm_error;
vm_error_not_a_bytevector:
SYNC_ALL ();
scm_wrong_type_arg_msg (func_name, 1, finish_args, "bytevector");
/* shouldn't get here */
goto vm_error;
vm_error_not_a_struct:
SYNC_ALL ();
scm_wrong_type_arg_msg (func_name, 1, finish_args, "struct");
/* shouldn't get here */
goto vm_error;
vm_error_not_a_thunk:
SYNC_ALL ();
scm_wrong_type_arg_msg ("dynamic-wind", 1, finish_args, "thunk");
/* shouldn't get here */
goto vm_error;
vm_error_no_values:
err_msg = scm_from_locale_string ("Zero values returned to single-valued continuation");
finish_args = SCM_EOL;
goto vm_error;
vm_error_not_enough_values:
err_msg = scm_from_locale_string ("Too few values returned to continuation");
finish_args = SCM_EOL;
goto vm_error;
vm_error_continuation_not_rewindable:
err_msg = scm_from_locale_string ("Unrewindable partial continuation");
finish_args = scm_cons (finish_args, SCM_EOL);
goto vm_error;
vm_error_bad_wide_string_length:
err_msg = scm_from_locale_string ("VM: Bad wide string length: ~S");
goto vm_error;
#ifdef VM_CHECK_IP
vm_error_invalid_address:
err_msg = scm_from_locale_string ("VM: Invalid program address");
finish_args = SCM_EOL;
goto vm_error;
#endif
#if VM_CHECK_OBJECT
vm_error_object:
err_msg = scm_from_locale_string ("VM: Invalid object table access");
finish_args = SCM_EOL;
goto vm_error;
#endif
#if VM_CHECK_FREE_VARIABLES
vm_error_free_variable:
err_msg = scm_from_locale_string ("VM: Invalid free variable access");
finish_args = SCM_EOL;
goto vm_error;
#endif
vm_error:
SYNC_ALL ();
scm_ithrow (sym_vm_error, scm_list_3 (sym_vm_run, err_msg, finish_args),
1);
}
abort (); /* never reached */
}
#undef VM_USE_HOOKS
#undef VM_CHECK_OBJECT
#undef VM_CHECK_FREE_VARIABLE
/*
Local Variables:
c-file-style: "gnu"
End:
*/
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